Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail)

v3.7.0.1
Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Mar. 31, 2016
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 47,900 $ 47,591
Less - accumulated depreciation and amortization 30,879 28,844
Property, plant and equipment, net 17,021 18,747
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 210 210
Buildings and Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 18,818 18,774
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 28,854 28,537
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 18 $ 70